Dont Want You to get Hurt

[Trent]

Saw someone do this today and thought of yall for some reason? <br /><br />Yall DO NOT I repeat DO NOT use a bench grinder on soft metals and wood. IT WILL CAUSE THE GRINDING ROCK TO EXPLODE!<br /><br />One of the things that causes a grinding wheel to explode is grinding a <br />material that the wheel is not designed for such as aluminum or other low <br />melting metals. The friction melts the aluminum and travels into the wheel <br />cools and expands, this causes the small fractures. This is the eventual <br />cause of the exploding wheel. Never grind aluminum !!!!!!! <br />Keep a container of water to cool any tool you are sharpening. As long as <br />don't forse your tool against the wheel it won't heat too much. Cool it in <br />water once every minute or so to be sure. <br /><br />Alot of people dont know this..Just thought Id pass it along.

 

[Jack Shellac]

Re: Dont Want You to get Hurt

Thanks, Trent. I never knew this.

 

[crab bait]

Re: Dont Want You to get Hurt

hey TRENT,, thanks for the heads up.. <br /><br />i seen wheels blow-up in safety films only.. an it's a bad ,bad thing..an goes right thru safety glasses.. <br /><br />i never knew what caused it.. just figured old wheels, factory defects, humidity ,ect.. <br /><br />but never knew of soft metals.. <br /><br />heck, i grind aluminum all-the-time.. never knew.. an i thought the 'water' was so not to take temper out, only.. <br /><br />i'll say again,, thanks.. cause i'm always afraid to use them, anyway..

 

[Terry H]

Re: Dont Want You to get Hurt

One other thing is to keep your face as much out of the line of the wheel as possible...if there is wheel come apart at least your face won't be in the way...just a thought

 

[sangerwaker]

Re: Dont Want You to get Hurt

Aw c'mon Chief, chicks dig scars!

 

[ZmOz]

Re: Dont Want You to get Hurt

You can't grind much aluminum anyway...it will just cover the wheel and ruin it rather quickly.

 

[self taut]

Re: Dont Want You to get Hurt

dont do it. remember stupid hurts

 

[Terry H]

Re: Dont Want You to get Hurt

Yur absolutely right sangerwalker...and I don't want anymore competition,

 

[crab bait]

Re: Dont Want You to get Hurt

plus i use my face as a blocker.. i hate patchin' holes in drywall..

 

[red10]

Re: Dont Want You to get Hurt

my dad just told me not to grind aluminum and i was wondering why, he didn't know the exact answer so now i'll tell him. Learn sumthin new everyday.

 

[gspig]

Re: Dont Want You to get Hurt

I thought the soft material clogged the wheel, made it lose grinding ability. Anyway, a man less than a mile from me was killed when his grinding wheel exploded. He had an old hand cranked wheel that he put an electric motor on, the wheel exploded and a chunk lodged in his brain.

 

[Trent]

Re: Dont Want You to get Hurt

Im glad that a few of yall saw this! Id rather see you post again on this board! Its just the little things sometimes....

 

[Boomyal]

Re: Dont Want You to get Hurt

Gulp, I grind aluminum all the time, usually just to clean up an edge from hacksawing it. Neither tool does well with aluminum anyway. Now ya got me skeered.

 

[Peter J Fraser]

Re: Dont Want You to get Hurt

Aluminum is no problem to grind but the disc's have a different composition to resist oxide buildup on the disc.<br />I grind Alum regularly and I aint scared of it.<br />Whatever discs or wheels you use make sure it has a rated MAX RPM that matches or exceeds the grinder speed.<br />Only 2 things will cause a disc to blow. <br />RPM far too high or the grinder has been dropped / jammed and the disc is damaged.<br />You NEVER use an old 14" Cut-off wheel in a grinder after it is worn down. <br />Very Dangerous Practise.<br />Our engineering shop uses grinder discs by the truckload each year and we have not had a disc explode in use.<br />Safety First..<br /><br />Good luck,<br />Peter

 

[Trent]

Re: Dont Want You to get Hurt

Peterf.... Their is a difference between "bench grinders" and the type your talking about. Yes I use "grinder discs" all the time also. Just dont use a bench grinder. The kind with the "heavy rock" type grinder.

 

[Peter J Fraser]

Re: Dont Want You to get Hurt

Hi Trent,<br />Yes I am aware of that also but you can also get "stones" to suit aluminum in that application. <br /><br />Peter

 

[Bigfun]

Re: Dont Want You to get Hurt

I don't see how it's possible for any thing to migrate into the wheel while it's spinning, centrifical force whould/ should prevent that. Right? Grinding on the side of the wheel might force stuff to migrate into the wheel. <br /><br />I think it's more important that you remember to stand off to the side or wear a full face motocycle helmet.